Iwas not sure if I sould post this problem in the installation and update forum or here.
But I have a running version online and I get 404 errors in my log.
The Problem is, that since a few months my host block the IP, when there are more than 3 404 errors. (For Security reasons.) So now we have the problem, that our users get blocked after a few sites and abort the questionnaire.

Update:
It is strange, because the one example with NotoSans-Italic is, that the file exists when I open the path in a FTP program or even when I open the link in the browser the file is found and downloaded.